foo.cc: In function 'int main()':
foo.cc:8:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 |     for(int i=0;i<s.size();i++)
      |                 ~^~~~~~~~~
foo.cc:9:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |         if(i==s.size()-1||s[i+1]==' ')
      |            ~^~~~~~~~~~~~

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